ASTM D4587 FREE DOWNLOAD

A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamps. Do not use arbitrary acceleration factors relating time in an exposure conducted according to this practice and time in an outdoor environment because they can give erroneous information. B The irradiance set point given is typical for devices operated without irradiance control. Periods of Exposure and Evaluation of Results 9.

astm d4587

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It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.

ASTM D _UV_resistance_百度文库

Where retention of characteristic property is reported, calculate results according to Practice D Refer to Practice G for detailed information on the caveats applicable to use of results obtained according to this practice. This practice also covers the preparation of test specimens, and the evaluation of test results. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration. C Previous editions of Practice D contained non-mandatory irradiance set points in Table 1 that were commonly used in the industry.

ASTM D4587

Note 1—Previous versions of this practice referenced fluorescent UV devices described by Practicewhich described very specific equipment designs. Periods of Exposure and Evaluation of Results 9. G Historical convention has established this as a very commonly used test cycle. The set points shown in this edition of D do not change the actual irradiances that have been historically used by these users.

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Other irradiance levels may be used, but must be described in the report. Where is it tested? Practice has been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives requirements for exposing nonmetallic materials in fluorescent UV devices. Measure ambient temperature sstm a maximum distance of mm 6 in.

astm d4587

If in doubt, users should consult the manufacturer of their device for clarification. Need help or have a question? Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

Nondestructive instrumental measurements are recommended whenever possible.

CEO’s Message

The set points shown in this edition of D do not change the actual irradiances that have been historically used by these users. NOTE 9—An example of a statistical analysis using multiple laboratory and exterior exposures to calculate an acceleration factor is described by J.

Interlaboratory comparisons are valid only when all laboratories use the same design of fluorescent UV device, lamp, and exposure conditions.

Do not use this covered area of the specimen as part of the test area. Practice G 53 has been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives requirements for exposing nonmetallic materials in fluorescent UV devices.

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The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples 3 x 6 inches 75 x mm. Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control. Seal any holes in specimens larger than 2 mm 0.

The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and saltwater exposure.

F Typical UsesE Automotive coatingsF 2 Industrial maintenance coatingsG 3 Exterior wood coatings 4 General metal coatings A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed.

Standards can be obtained from appropriate standard authorities.

astm d4587

Precision and Bias Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. Historical Version s – view previous versions of standard. Refer to Practice G for detailed information on the caveats applicable to use of results obtained according to this practice. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

astm d4587

When a single d44587 period is used, select a time or radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material.